Valve mechanism for gas-engines.



S. JACHIMOYIGZ. VALVE MEGHANISM Fon GAS ENGINES.

APPLICATION FILED AUG. 2. 1907.

Patented Feb. 9, 1909.

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INVENTUH wmvfssfs: 71.

Mfg

Arm/wer SZYMON JACHDIOVICZ, OF BERKELEY, CALIFORNIA.

VALVE MECHANISM FOR GAS-EN GINES.

' Specification of Letters Patent.

Patented Feb. 9, 1909.

Application led August 2, 1907.v Serial No. 386,819.

To all whom it'may concern.'

Be it known that I, Szrirox JAcHniovrCz, a subject of the Emperor ofRussia, residing at Berkeley, in vthe county of Alameda and. State ofCalifornia, have invented new and useful Improvements in Valve Mechanismfor Gas-Engines, of .which they following is a specification.

This invention relates to improvements in the means for admitting airand gas for gas engines, and for exhausting therefrom.'

The objects of the invention are, first, to actuate both the inlet andtheexhaust valves by a single eccentric; second, to provide a sim lemeans for. regulating the mixture, bot quantitatively, as to. the amountadmitted, and qualitatively, Aas to the proportion of air and gas and inboth cases'without thi'ottling the gas supply; third, to provide simplemeans for maintaining the valve closed When starting the engine bycompressed air; fourth, to provide an arrangement whereby, when using acomparatively small proportion of gas, the gas is admitted in a partonly ofthe stroke, so that. a portion of the charge is a comparativelyrich mixture of gas and air, whereby a greater certainty of explosion isobtained iifth, to provide means whereby the amount of air admitted maybe pro lortioned to the quality of thegas used, so t iat when goed gasis used more an' 'can be admitted and less air when poor gas is used gsixth, to provide an arrangement by which adjustment of the ports forthe air and gas, to reduce the amount of the iiuid admitted may takeplace in a verticaland not in a Ahorizontal direction, and whereby alsothe air shall be admitted above the gas and in a downward directionthereby insuring as milch as possible the complete mixture of the gasand air; seventh, to provide means whereby the control of the ymechanismfor admitting the air and gas shall entailA as little Work as possibleupon thegovernor.

In the accompanying drawings, Figure 1 is a transverse section, of theadmission end of a gas engine to which my improvement is applied; Fig. 2is a detail sectional View ofthe valve chamber; Fig. 3 is a horizontalsection of the same on the line 3-3 of Fig. 1; Fig. 4 is a diagrammaticview of one of the air ports and of a portion of the slide valveadjaceutthereto Fig. 5 is a similar view of the gas inlet; 6 is a view, similarto Fi 1, of a modification of my invention as app 'ed to an old forni ofsingle acting gas en gine g Fig. 7 is a broken longitudinal section oi'the same.

Referring to the dmv-ing, 1 indicates the casing of the engine, havingthe inlet valve 2 and the exhaust valve 3, the latter operated by meansoi' an eccentric 1, through a lug 11)- on the ring 20 of the eccentric,a bell crank lever 5 and a. link 6.'

The linlet valve 2 is carried by a 'stem T connected to a union 8, whichin itsturn is connected to a stein 9 which is normally raised by meansof a spring 1U. Upon this union are pins 11, which are adapted to beengaged byl a forked lever. 12, pivoted at 13 on an extension 14 from'the head ol' the valve box 15. The outer' end ot' said lever isadaptedto be engaged bya hooked lever 16 pivoted at 1T on the upper end ot' apitnian 1S, connected to a lug 19 of the ring 2() oil the eccentric 4.Said pitman is also connected by a link'21 with the same pivot as thelever 12.

The hooked lever 16 is provided with a tail 22, which-is engaged by twosprings 23, 24, so as to normally maintain it in its operative positionon the pitinan. Yith the lever 12 is connected the rod 25 .of a pistonworking in a dash pot 26 attached to a bracket 27 extending from thevalve box 15. Adjustably attached to the extension 14 is a curved de-vflcctor 2S which is adapted to engage a nose 29 on the hooked lever 16.In the drawing, the pitnian is shown 11i its lowest position and as itrises by reason oi the rotation of the eccentric 4, the hooked end ofthe leve'r 16 engages the end oi' the lever 12 and thereby depresses thevalve 2 admitting to the engine the mixture of gas and air. As thepitman continues to rise the nose 2) strikes against the deilector 2S,causing the hook to be withdrawn from the end olI the lever 12,whereupon the valve immediately rises under the action of the'spring 10..is the. pitman de- 'sc-ends, owing to the continued rotation of theeccentric, the hook again returns to its norma-l position ready toengage t he end ol' the lever 12.

The curved deilector 2S is automatically adjusted by a lever 31 which isconnected by a link 32 to the governor 30, of the gas engine, so thatthe cut-oil is automatically controlled by the governor according to thespeed of the gas engine. Y

/33 indicates the air inlet conduit and 31 the gas inlet conduit. T hcconduit 33 lea-ds to a \cliamber 35 connected by passages 36 Oxv withthe interior of the valve box 15. In like manner, the conduit 34 leadsto a cham- Between the chambers 35 and 37 is anv annular chamber 38having upper and lower ports 39 and 40 extending respectivelyl obliquelyupwards and downwards from the chamber to the interior ofthe valve box.

The two ports 39, 40, are made oblique so as to direct the current ofair at such an an le as to effect the most perfect mixture with t eYithin the valve box slides the valve 41 which is attached to a sleeve42 around thevalve stem. Said sleeve and the valve connected therewithreciprocate always 1n umson with the inlet valve, but can be turnedaround said stem by means of a slot 43 formed in said sleeve, into whichextends a in 44 from a collar 45, connected with aever 46 connected'through the deflector shaft with the 4governor 30 of the engine, so thatthe valve is turned automatically in accoi-dance with the speed of theengine. The passage of the air is controlled by a ring 47,

. which can be moved by rods 48 over either of formed with radial webs53 on which areI formed the lower slide valve which slides' over the gasinlet ports ,55 said slide 54I being undercut onQits upper surface so asto form a small chamber in which any deposits of tar, or like matter canbe received, to prevent the valve sticking. The upper slide52 is in theform of a narrow cylinder, so as to conform to the arrangement of theupper air ports,

but thel lower vslide.' 54 has its upper edge formed in'a series ofinclines conforming to the spiral form of the' gas inlets 55. Thisarrangement-is shown diagrammatically in Fig.

5 in whichthefull lines show the osition for a maximum admission andtheotted lines It will readily bey for minimum admission. seen that, in theformer position, they gas inlet ports are'opened as soon as the valvebegins to move downwards and therefore a maximum admission of gas isobtained, but when the valve has been moved to t-heposition shown indotted lines, the valvedescends a considerable distance, before the gasinlet ports begin toy be uncovered and said .inlet ports remainuncovered for a comparatively short time, so that in the latter positionthe proportion of gas to air is reduced. n

When the gas engine is to be started by the use of compressed air,it'i'is necessary to maintain the inlet valve closed otherwise thecompressed air would escape, and to accomwhole of the stroke of thevalve,

vplish this result, there is provided a lever 57 f adapted to beoperated by means of a link 58, the end of said lever when so operatedbeing moved to such a position that it interferes with thehook 16 whenin its lower position and prevents the latter engaging the end of thelever 12 to open the inlet valve.

It will be observed that the inlet and ex'- haust vvalves are bothoperated from a single eccentrica This I am enabled to accomplish bymeans of the two lu s 19, 19', the 1in s 6 and 18. y

In Figs. 6 and 7 is shown a modification of my'invention applied to anold'style of engine. In this modification also, 2 indicates the inletvalve and,3 the exhaust valve, and, as before, there'is a sleeve 42movable with the valve stem and, rotatable on said stem, p said sleevecarrying a slide piece. In the 35 resent instance, there is shown ahandle 60 or so turning saidftube. It mj' be,'l`how ever, also turnedfrom the governor in the same way as infthe former modification. Thegeneral arrangement of the `valve ports and the slide is similar to thatin the first modification, except that the'intermediate chamber 38 isnow dispensed with, and the air is admitted direct from the air chamber35.

special arrangement ofthe t e bell `'crank lever 5, and l' Instead ofthe valve being operated lby an eccentric,`as in the first modification,it is now o erated by means of a cam 61 and this cam s ould be of suchform that the valve shall not remain at rest for any appreciable portionof the stroke when it is opened toits full extent. By providing a cam ofthis form it is possible to reduce as much as may be' desired, theamount of gas admitted. `-lf t-hecam were of such a form that, for aconsiderable part of the stroke, Athe valve remained stationary whenopened, then during this part of the stroke, when t-he valve so remainedstationary, it would not be possible to make any variation in the.amount of gas admitted. It" will also be observed that by thisconstruction of air and gas inlets, so regulated, 'while the air isadmitted ring the e as, when admitted for a part only of the strgke, isadmitted wholly in the middle portion of said stroke; that is to say, inthe latter case,` the air is admitted both before and afte` the gas isadmitted. The ro` ortion of the part of the stroke during wllic 1 thegas is so admitted in the middle of the stroke will var 120 with theproportions of the mixture desire and is obtained by turning the slidevalvey from the governor. But in all cases, exce t when the gas is-admitted during the who e stroke, the admission of the gas is confinedto the middle part of the stroke. The advantage of this arrangement is,that thereby the ignition is much more certain andefl'ectiv'e when avery small'amount of gas is admitted.

los

'In rior devices,=when a comparatively small 1:3

air, which mixture is" between tivo layers' of comparatively pure air.In order, however, vto obtain the benefit of this arrangement it isnecessary that the ignition device 65 shouldl be arranged in proximityvrith this comparatively rich middle layer of the mixture, that is, itshould be placed as near as possible to the middle of compressionchamberwhere this layer of comparatively rich mixture will be foundbefore ignition.

I claim 1. In a gas engine, the combination with the body of the engine,of a shaft, an eccentric upon said shaft, a ring on said eccentrichaving two lugs, a lever connected to one of said lugs and to the engineframe, 'means for opening the exhaust valve by the movement of saidlever, a rod connected to the other lug ofthe eccentric, a hooked membercarried by said rod and adapted to engage the lever which opens theinlet valve, means controlled by the governor for breaking saidengagement, a spring for closing said valve, a slide valve movable withsaid inlet valve but rotatable around its stem, a valve box having` airports arranged in planes at right angles to the axis of said box and gasports spirally arranged, said slide valve having edges adapted to coversaid air and gas ports, and means controlled by' the governor to rotatesaid slide valve, whereby the gas may be admitted only after the air hasbeen admitted.

2. In a gas engine, a mixing chamber hav' ing circumferential air portsand inclined gas ports, a slide valve in said mixing chamber reeiprocating with the inlet valve and having a correspondingly shaped edgeadapted to coversaid ports, means controlled bythe governor for rotatingsaid slide-valve relatively to said ports, whereby the opening of thegas ports by said slide valve may be retarded and their closing advancedrelatively to the opening and closing of the air ports which remainconstant.

3. In a gas engine, the combination of a valve box having air and gasports, the latter being arranged obliquely, an inlet valve, a slidepiece movable with said inlet valve, but rotatable with reference tosaid ports, and means for so rotating said slide piece,'that the gas maybe admitted only after the airV has been admitted, substantially asdescribed. Li. In a gas engine, the combination, vth

the body of thev engine having a mixing chamber and a compressionchamber, an inlet valve between the mixing chamber and the compressionchamber, air and gas ports in the Wall of the mixing chamber', meansreciprocating with the inlet valve for opening and closing said ports,means for rotating one of the said elements, the said Wall and theclosing and opening means, relative to the other, said ports and saidclosing means being conformed to vary the time of opening of said portsby said reciprocation, substantiallyas described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing Witnesses.

' SZYMON JACHIMOVICZ.

Witnesses:

FRANCIS M. WRIGHT, D. B. RICHARDS.,

